Apple recently released an update for their Mac OS X Lion operating system.
The delta edition of the update which is the more popular option amongst the users turned out to be a problem for a lot of people.
A lot of people faced app crashes and a weird CUI error.
The company seems to have recognized the problem and they are now redirecting users to the combo update which is a bigger download and slightly complicated to install.
We believe Apple would eventually update the delta edition as well. For now, combo update is the option you have if you have still not updated your Lion installation.